Roth vs. Pre-Tax 401(k)

Compare the Tax Timing and Your Paycheck

The Roth vs. pre-tax 401(k) decision changes when you generally pay federal income tax on your retirement savings. Pre-tax employee contributions generally reduce current federal taxable income, with taxable distributions later. Roth contributions are included in current income, while qualified distributions can be tax-free. Both may be available inside a workplace retirement plan, and neither is automatically the best choice for every participant.

This election is separate from deciding how much to contribute or which funds to select. A $100 contribution can go into the plan under either tax treatment, while the effect on your paycheck differs. Your current income-tax situation, future income and available cash flow all belong in the comparison. Age can provide context, but it should not decide the answer by itself.

Understand the tax-timing difference

Pre-tax employee contributions generally reduce the income subject to current federal income tax. The account can grow tax-deferred, and taxable withdrawals are generally included in income later. Roth employee contributions are included in income when contributed, without that current federal income-tax reduction. The IRS describes these basic differences here

A qualified Roth 401(k) distribution generally requires a five-taxable-year participation period plus a distribution after age 59½, death or disability. Qualified treatment can include the earnings as well as the contributions. Nonqualified distributions can have different tax consequences. Check the IRS guidance rather than assuming every Roth withdrawal is tax-free.

Compare what reaches the account and what leaves your paycheck

The video uses a $100 payroll contribution to show why the account amount and take-home-pay effect are different questions. Under either contribution type, $100 goes into the plan. With pre-tax contributions, the current federal income-tax reduction can offset part of the effect on your paycheck. With Roth, the contribution does not receive that current reduction.

Assume, for illustration only, that the entire $100 would otherwise be taxed at a 22% marginal federal income-tax rate. A $100 pre-tax contribution would reduce current federal income tax by approximately $22, making the simplified reduction in take-home pay about $78. A $100 Roth contribution would reduce take-home pay by about $100 under the same simplified assumptions. The illustration excludes state taxes, credits, phaseouts and other tax interactions.

This compares equal contributions, not equal take-home-pay costs. A fair comparison should identify which amount you are holding constant before evaluating the alternatives. Employee pre-tax and Roth salary deferrals generally remain subject to Social Security and Medicare taxes. The IRS explains the withholding treatment here.

Consider your financial situation

Compare the value of a current income-tax reduction with the possibility of qualified tax-free distributions later. Your household’s future income may include more than withdrawals from this one account. Other savings, Social Security, pension income and work plans can affect the conversation. Ask your tax professional to review the expected household picture rather than relying on one label or age-based rule.

Your budget matters as well. If current cash flow is tight, understand the take-home-pay difference before submitting a change. If your earnings or household situation have changed, an older election may deserve another review. Future income and tax law remain uncertain, so the decision should account for that uncertainty without pretending it can be eliminated.

Consider pre-tax, Roth or both

Pre-tax contributions may be worth discussing when a current income-tax reduction is especially valuable. Roth may be worth discussing when paying tax now fits your circumstances and the qualified distribution treatment could be useful later. Neither conclusion follows automatically from being young, nearing retirement or expecting one particular investment return. The contribution’s tax treatment should fit the larger financial plan.

If your plan permits, you may divide employee contributions between pre-tax and Roth. Using both does not create two separate employee contribution limits. It can create different tax sources for later planning, while the total still needs to fit your budget and the applicable limit. Your tax professional can help you evaluate whether that flexibility is useful in your circumstances.

Check your retirement plan before changing the election

Confirm whether the plan offers designated Roth contributions and how to submit an election. Look for a take-home-pay calculator if the recordkeeper provides one. Ask how employer contributions are treated, because their treatment may differ from your employee contributions. Review the plan’s current rules rather than assuming all money in the account has the same tax character.

Keep future contributions separate from decisions about money already saved. Changing a payroll election does not automatically convert your existing pre-tax balance to Roth. A conversion, rollover or withdrawal is a separate transaction with its own considerations. Ask about the specific action you are contemplating before making it.

Prepare one question for your next review

Start by confirming your current election and the question you need answered, such as how a change would affect your paycheck. Bring the plan details to your tax professional for a discussion of your circumstances. After an election change, check a later pay statement to confirm it was applied. McClone’s Learning Center offers related retirement education.

Securities offered through LPL Financial, a Registered Broker Dealer, Member FINRA/SIPC. Investment advice offered through Gateway Wealth Partners, LLC, a registered investment advisor. Gateway Wealth Partners, LLC, McClone Retirement Advisors and LPL Financial are separate entities. TAX AND LEGAL DISCLAIMER: McClone and its affiliates do not provide tax, legal or accounting advice. Any material prepared is for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and/or accounting advisors before engaging in any transactions.